I got a quote this week 1.50 a sq for total scrape off, new top soil layer, install and roll. Goes up to 2.00 a sq if total is 3k sq or less. I don't have any other numbers to know if that is good or not. Using that one data point you would be at 2700.
Good quality sod is around $250 a pallet that will cover 450sq.
This is in Houston. Btw